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Process Equipment and Plant Design

Process Equipment and Plant Design
With increase in the number of shell passes, the value of FT

Remains same
Remains same, only if the number of tube passes does not change
Decreases
Increases

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Lower static submergence
Lower skirt clearance
Liquid gradient on the tray
Small downcomer liquid seal

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Process Equipment and Plant Design
Speed of industrial paddle agitator ranges from __________ rpm.

20 to 100
500 to 750
1 to 5
1000 to 2000

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Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Vapour density
None of these
Entrainment considerations
Diameter of the column

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Process Equipment and Plant Design
25 per cent cut segmental baffle means that the baffle

Height is 75% of the I.D. of the shell
Spacing is 75% of its height
Width is 25% of its height
Height is 25% of the I.D. of the shell

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Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/2 to 1/4th
1/20-1/30th
1/10-1/15th
1/5-1/10th

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